Weren't there some of these printed with private keys under a strip?
I still think there's some potential for legitimate off-chain paper transactions if you had a mechanism to guarantee a private key has not been copied. Kind of like an opendime but with paper. The mint would still need to be trusted though.
That’s a nice idea 💡
I tried to brainstorm it roughly once with time-locked transactions to guarantee a bill controls a specific UTXO before and expiration, but I'm not sure I'm smart enough to spec it out or if it's even possible how I envision it.
Real bitcoin as cash or even a physical L3 would open up a lot of possibilities though.
You can lock it with ecash l3. And put a security mark on top of the paper. Other idea would be do lnurl but honestly haven’t tried it out if it’s possible to make it time-locked
